#fixture {
  background: #ccc;
  width: 50px;
  height: 50px;
  -webkit-border-radius: 25px;
  position: absolute;
  left: 0px;
  top: 0px;
}

#fixture[data-frame='0']{
  left: 0px;
}

#fixture[data-frame='20']{
  left: 20px;
}

#fixture[data-frame='40']{
  left: 40px;
}

#fixture[data-frame='60']{
  left: 60px;
}

#fixture[data-frame='80']{
  left: 80px;
  background-color: red;
}